[Lex Computer & Tech Group/LCTG] Speed of gravity

[Carl Lazarus]

2 seconds out of 130 million years is not much of a discrepancy.  Assuming
it’s not an issue with our measurements, one starting 2 seconds before the
other seems like a possible explanation.

On Thu, Oct 27, 2022 at 2:43 PM Steve Isenberg <smisenberg at gmail.com> wrote:

> According to the speed of gravity article, they measured the speed of
> gravitational waves compared to the speed of light, by recording the
> relative time that the two waves reached Earth from an event that occurred
> 130 million years ago when two neutron stars collided and thus emitted both
> gravitational waves and light waves.
> The gravitational waves and light waves arrived within 2 seconds of each
> other.
>
> The article concludes that the two speeds (gravity, light) are exactly the
> same (which on one hand makes sense).
>
> However, how do they account for the 2 seconds difference in the arrival
> time of the two waves?
>
> I suspect that it's due to gravitational influence of objects between us
> and the two neutron stars, or maybe the distance between locations of the
> two instruments on or near Earth (but I would have expected them to account
> for this).  Or maybe the light was emitted by the neutron star collision
> just a little before or after the gravitational waves.
>
> Anyone here have any thoughts on this?
> -steve
>
> On Thu, Oct 27, 2022 at 2:23 PM john rudy <jjrudy1 at comcast.net> wrote:
>
>> Pretty interesting
>>
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